package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * ClassName: AutoFillAspect
 * Package: com.sky.aspect
 * Description: 自定义切面，实现公共字段自动填充处理逻辑
 *
 * @Author 谢依雯
 * @Create 2024/11/16 13:34
 */
@Component
@Aspect
@Slf4j
public class AutoFillAspect {

    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void pt(){}

    @Before("pt()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始公共字段填充");
        //获取数据库操作类型
        MethodSignature signature= (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();

        //获取被拦截方法的实体参数
        Object [] args=joinPoint.getArgs();
        if(args==null || args.length==0)
            return;

        Object entity=args[0];

        //准备赋值的数据
        LocalDateTime time=LocalDateTime.now();
        Long user= BaseContext.getCurrentId();

        //根据不同类型操作，通过反射对对应属性赋值
        if(operationType==OperationType.INSERT){
            try {
                Method setCreateTime=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);
                Method setCreateUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class);
                Method setUpdateTime=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                Method setUpdateUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

                setCreateTime.invoke(entity,time);
                setCreateUser.invoke(entity,user);
                setUpdateTime.invoke(entity,time);
                setUpdateUser.invoke(entity,user);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        else if(operationType==OperationType.UPDATE){
            try {
                Method setUpdateTime=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                Method setUpdateUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

                setUpdateTime.invoke(entity,time);
                setUpdateUser.invoke(entity,user);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

    }
}
